package lab02.test06;

public class Triangle {
    double length1;
    double length2;
    double length3;
    double high;
    boolean judge;
    double area(){
        high=((double)(length1+length2+length3))/2;
        return (float)Math.sqrt(high*(high-length2)*
                (high-length3));
    }
    double perimeter(){
        return length1+length2+length3;
    }
    void  isJudge(){
        if (length1+length2<length3||length1+length3<length2||
                length2
                +length3<length1){
            System.out.println("不能构成三角形");
        }else System.out.println("可以构成三角形");

    }
}
